Node.js · Middle · Question 6 of 75

A request handler runs a CPU-heavy loop for 2 seconds. What happens to other requests?

1They are processed in parallel on other threads automatically
✓Correct answer: They wait: while JavaScript runs on the main thread, the event loop can't handle anything else
3Node.js stops the loop after 100 ms

Explanation

Move heavy CPU work to worker_threads, a separate service or a job queue, or split it into small chunks with setImmediate between them.

Further reading

Node.js Learn: Don't block the event loop ↗

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